Omg man, he already answear your question, the driver that you are looking for is the x1xxx series, and since your graphic card is not supported in windows 7, you have to try the vista version, run it with compatible mode and administration rights.

Edit: If you can´t run it, install 7zip, unpack the executable, go to Bin folder and run the setup from there, with compatible mode and administration rights.

It works like this, the drivers has a selection (family/architecture), if the series has the same features and they are compatible, the drivers are selected as one, like it works right now in 2017 (HD series, R5 ,R7, R9, RX, etc) they all use the same features, just handles diferent, like you can see in this picture, this driver is compatible for all this models

The Drivers web page, is more to help ppl to find what are they looking for and for legacy models that are no longer supported (like a noob search drivers page)

But anyway, the drivers selection can be independent if they are still in beta stage, (like a new graphic card release) and when the driver is stable and the graphic card handle it, its merged to the family on the new version drivers...

Normally you can do that in game settings, if the developers of the game allow it to be done... or you can do Alt+Enter to go fullscreen... but if dont work, there are other methods to force Fullscreen, like force borderless without the bars, with 3º party softwares